erc-cmd-H

erc-cmd-H is an alias for `erc-cmd-HELP' in `erc.el'.

(erc-cmd-H &optional FUNC)

Popup help information.

If FUNC contains a valid function or variable, help about that
will be displayed. If FUNC is empty, display an apropos about
ERC commands. Otherwise, do `apropos' in the ERC namespace
("erc-.*LINE").

Examples:
To find out about erc and bbdb, do
/help bbdb.*

For help about the WHOIS command, do:
/help whois

For a list of user commands (/join /part, ...):
/help.